Net Income per Common Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of reconciliation of weighted average shares

A reconciliation of the weighted average basic common shares outstanding to the weighted average diluted common shares outstanding is as follows:

	Three Months Ended
(millions, except share and per share data) (unaudited)	March 31, 2020			March 31, 2019
Net (loss) income attributable to SP Plus Corporation	$	(46.1	)	$	10.6
Basic weighted average common shares outstanding	21,154,047			22,509,050
Dilutive impact of share-based awards	—			158,489
Diluted weighted average common shares outstanding	21,154,047			22,667,539
Net (loss) income per common share
Basic	$	(2.18	)	$	0.47
Diluted	$	(2.18	)	$	0.47